Great looking car and I like the concept!
My Spec Boxster currently weighs around 2,461 lbs with no fuel (close to 500 lbs lighter than a stock 986).
Entire car build is documented here (thanks for the shoutout Chuck!):
http://986forum.com/forums/boxster-racing-forum/46070-spec-boxster-build.html
Also, the muffler you installed will give you a few extra horsepower at the high rpm (dyno results are in the link above) and removing the cat's and installing test pipes will definitely increase the
SOUND LEVEL. I wear earplugs.